Finding the Fourth Proportional to 1,571.51, 2,168.78 and 942.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.51 : 2,168.78 = 942.05 : x
2. Step 2: Convert to fraction form
   1,571.51/2,168.78 = 942.05/x
3. Step 3: Cross multiply
   1,571.51x = 2,168.78 × 942.05
4. Step 4: Simplify right side
   1,571.51x = 2,043,083.64
5. Step 5: Solve for x
   x = 2,043,083.64/1,571.51
6. Step 6: Final answer
   x = 1,300.08